6646587291012 has 12 divisors (see below), whose sum is σ = 15508703679056. Its totient is φ = 2215529097000.

The previous prime is 6646587291007. The next prime is 6646587291073. The reversal of 6646587291012 is 2101927856466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276941137114 + ... + 276941137137.

Almost surely, 2^{6646587291012} is an apocalyptic number.

It is an amenable number.

6646587291012 is an abundant number, since it is smaller than the sum of its proper divisors (8862116388044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6646587291012 is a wasteful number, since it uses less digits than its factorization.

6646587291012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553882274258 (or 553882274256 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 6646587291012 in words is "six trillion, six hundred forty-six billion, five hundred eighty-seven million, two hundred ninety-one thousand, twelve".